{
  "manageEntity": {
    "action": "Save",
    "entityId": "300312",
    "entityType": "Track",
    "nonce": "0x614d9cff8c6fa995a94657d48d8c0f32d1953f6807438580b12a329ff5785bda",
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    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
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}